This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 Excerpt: ...to be rebuilt into living matter again, some to break into simpler and simpler compounds and to leave the body (e.g. as CO2, H2, etc.). Metabolism is an old general name for all the chemical changes in a living organism. The constructive phases of nutrition are often summed up in the term anabolism or constructive ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 Excerpt: ...to be rebuilt into living matter again, some to break into simpler and simpler compounds and to leave the body (e.g. as CO2, H2, etc.). Metabolism is an old general name for all the chemical changes in a living organism. The constructive phases of nutrition are often summed up in the term anabolism or constructive metabolism; the destructive phases as catabolism or destructive metabolism. In the former the processes tend to be synthetic; in the latter analytic. Having considered the synthetic processes, the analytic ones demand attention in the next chapter. CHAPTER IV.--DESTRUCTIVE METABOLISM i. RESPIRATION Respiratory organs.--The word respiration, or its English equivalent, breathing, suggests at once the currents of air into and out of the lungs, and the bodily movements that cause them. The reason for this is that so much attention has been given to these matters in human physiology that the more important processes, which take place in the muscles and live tissues generally, have been almost ignored. This is emphasized by the fact that the phrase "respiratory organs " means the lungs and the air passages thereto, while the blood, which is an equally important adjunct to the aeration of the tissues, is not usually included. But airpassages, lungs, chest wall, diaphragm, blood vessels, and blood, not to mention others, are all necessary organs. The fundamental processes, however, take place in the living cells; and they go on there, for a time at least, whether or not, by accessory mechanical means; the oxygen of the air is supplied and the waste products removed. Since in plants the accessory organs are very simple indeed, their structure and behavior needs little consideration, particularly as they are at the same time, in green plants, rela...
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Add this copy of A Textbook of Botany: Volume One. Morphology to cart. $10.00, good condition, Sold by Sapsucker Books rated 4.0 out of 5 stars, ships from Grafton, VT, UNITED STATES, published 1910.